diff options
Diffstat (limited to 'modules/enet')
| -rw-r--r-- | modules/enet/SCsub | 2 | ||||
| -rw-r--r-- | modules/enet/doc_classes/NetworkedMultiplayerENet.xml | 10 | ||||
| -rw-r--r-- | modules/enet/networked_multiplayer_enet.cpp | 31 |
3 files changed, 24 insertions, 19 deletions
diff --git a/modules/enet/SCsub b/modules/enet/SCsub index a57a4b29ea..78d8d43414 100644 --- a/modules/enet/SCsub +++ b/modules/enet/SCsub @@ -21,7 +21,7 @@ if env['builtin_enet']: ] thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources] - env_enet.Append(CPPPATH=[thirdparty_dir]) + env_enet.Prepend(CPPPATH=[thirdparty_dir]) env_enet.Append(CPPFLAGS=["-DGODOT_ENET"]) env_thirdparty = env_enet.Clone() diff --git a/modules/enet/doc_classes/NetworkedMultiplayerENet.xml b/modules/enet/doc_classes/NetworkedMultiplayerENet.xml index 4976a90945..d3d1e58b7b 100644 --- a/modules/enet/doc_classes/NetworkedMultiplayerENet.xml +++ b/modules/enet/doc_classes/NetworkedMultiplayerENet.xml @@ -1,5 +1,5 @@ <?xml version="1.0" encoding="UTF-8" ?> -<class name="NetworkedMultiplayerENet" inherits="NetworkedMultiplayerPeer" category="Core" version="3.1"> +<class name="NetworkedMultiplayerENet" inherits="NetworkedMultiplayerPeer" category="Core" version="3.2"> <brief_description> PacketPeer implementation using the ENet library. </brief_description> @@ -10,8 +10,6 @@ <link>https://docs.godotengine.org/en/latest/tutorials/networking/high_level_multiplayer.html</link> <link>http://enet.bespin.org/usergroup0.html</link> </tutorials> - <demos> - </demos> <methods> <method name="close_connection"> <return type="void"> @@ -36,7 +34,7 @@ <argument index="4" name="client_port" type="int" default="0"> </argument> <description> - Create client that connects to a server at [code]address[/code] using specified [code]port[/code]. The given address needs to be either a fully qualified domain nome (e.g. [code]www.example.com[/code]) or an IP address in IPv4 or IPv6 format (e.g. [code]192.168.1.1[/code]). The [code]port[/code] is the port the server is listening on. The [code]in_bandwidth[/code] and [code]out_bandwidth[/code] parameters can be used to limit the incoming and outgoing bandwidth to the given number of bytes per second. The default of 0 means unlimited bandwidth. Note that ENet will strategically drop packets on specific sides of a connection between peers to ensure the peer's bandwidth is not overwhelmed. The bandwidth parameters also determine the window size of a connection which limits the amount of reliable packets that may be in transit at any given time. Returns [code]OK[/code] if a client was created, [code]ERR_ALREADY_IN_USE[/code] if this NetworkedMultiplayerEnet instance already has an open connection (in which case you need to call [method close_connection] first) or [code]ERR_CANT_CREATE[/code] if the client could not be created. If [code]client_port[/code] is specified, the client will also listen to the given port, this is useful in some NAT traversal technique. + Create client that connects to a server at [code]address[/code] using specified [code]port[/code]. The given address needs to be either a fully qualified domain name (e.g. [code]www.example.com[/code]) or an IP address in IPv4 or IPv6 format (e.g. [code]192.168.1.1[/code]). The [code]port[/code] is the port the server is listening on. The [code]in_bandwidth[/code] and [code]out_bandwidth[/code] parameters can be used to limit the incoming and outgoing bandwidth to the given number of bytes per second. The default of 0 means unlimited bandwidth. Note that ENet will strategically drop packets on specific sides of a connection between peers to ensure the peer's bandwidth is not overwhelmed. The bandwidth parameters also determine the window size of a connection which limits the amount of reliable packets that may be in transit at any given time. Returns [code]OK[/code] if a client was created, [code]ERR_ALREADY_IN_USE[/code] if this NetworkedMultiplayerEnet instance already has an open connection (in which case you need to call [method close_connection] first) or [code]ERR_CANT_CREATE[/code] if the client could not be created. If [code]client_port[/code] is specified, the client will also listen to the given port, this is useful in some NAT traversal technique. </description> </method> <method name="create_server"> @@ -62,7 +60,7 @@ <argument index="1" name="now" type="bool" default="false"> </argument> <description> - Disconnect the given peer. If "now" is set to true, the connection will be closed immediately without flushing queued messages. + Disconnect the given peer. If "now" is set to [code]true[/code], the connection will be closed immediately without flushing queued messages. </description> </method> <method name="get_last_packet_channel" qualifiers="const"> @@ -112,7 +110,7 @@ Always use [code]TRANSFER_MODE_ORDERED[/code] in place of [code]TRANSFER_MODE_UNRELIABLE[/code]. This is the only way to use ordering with the RPC system. </member> <member name="channel_count" type="int" setter="set_channel_count" getter="get_channel_count"> - The number of channels to be used by ENet. Default: [code]3[/code]. Channels are used to separate different kinds of data. In realiable or ordered mode, for example, the packet delivery order is ensured on a per channel basis. + The number of channels to be used by ENet. Default: [code]3[/code]. Channels are used to separate different kinds of data. In reliable or ordered mode, for example, the packet delivery order is ensured on a per channel basis. </member> <member name="compression_mode" type="int" setter="set_compression_mode" getter="get_compression_mode" enum="NetworkedMultiplayerENet.CompressionMode"> The compression method used for network packets. Default is no compression. These have different tradeoffs of compression speed versus bandwidth, you may need to test which one works best for your use case if you use compression at all. diff --git a/modules/enet/networked_multiplayer_enet.cpp b/modules/enet/networked_multiplayer_enet.cpp index e53846e269..18dfe08e85 100644 --- a/modules/enet/networked_multiplayer_enet.cpp +++ b/modules/enet/networked_multiplayer_enet.cpp @@ -231,6 +231,13 @@ void NetworkedMultiplayerENet::poll() { break; } + // A client joined with an invalid ID (negative values, 0, and 1 are reserved). + // Probably trying to exploit us. + if (server && ((int)event.data < 2 || peer_map.has((int)event.data))) { + enet_peer_reset(event.peer); + ERR_CONTINUE(true); + } + int *new_id = memnew(int); *new_id = event.data; @@ -339,11 +346,10 @@ void NetworkedMultiplayerENet::poll() { uint32_t *id = (uint32_t *)event.peer->data; - ERR_CONTINUE(event.packet->dataLength < 12) + ERR_CONTINUE(event.packet->dataLength < 8) uint32_t source = decode_uint32(&event.packet->data[0]); int target = decode_uint32(&event.packet->data[4]); - uint32_t flags = decode_uint32(&event.packet->data[8]); packet.from = source; packet.channel = event.channelID; @@ -364,7 +370,7 @@ void NetworkedMultiplayerENet::poll() { if (uint32_t(E->key()) == source) // Do not resend to self continue; - ENetPacket *packet2 = enet_packet_create(packet.packet->data, packet.packet->dataLength, flags); + ENetPacket *packet2 = enet_packet_create(packet.packet->data, packet.packet->dataLength, packet.packet->flags); enet_peer_send(E->get(), event.channelID, packet2); } @@ -378,7 +384,7 @@ void NetworkedMultiplayerENet::poll() { if (uint32_t(E->key()) == source || E->key() == -target) // Do not resend to self, also do not send to excluded continue; - ENetPacket *packet2 = enet_packet_create(packet.packet->data, packet.packet->dataLength, flags); + ENetPacket *packet2 = enet_packet_create(packet.packet->data, packet.packet->dataLength, packet.packet->flags); enet_peer_send(E->get(), event.channelID, packet2); } @@ -426,7 +432,6 @@ bool NetworkedMultiplayerENet::is_server() const { void NetworkedMultiplayerENet::close_connection(uint32_t wait_usec) { ERR_FAIL_COND(!active); - ERR_FAIL_COND(wait_usec < 0); _pop_current_packet(); @@ -497,8 +502,8 @@ Error NetworkedMultiplayerENet::get_packet(const uint8_t **r_buffer, int &r_buff current_packet = incoming_packets.front()->get(); incoming_packets.pop_front(); - *r_buffer = (const uint8_t *)(¤t_packet.packet->data[12]); - r_buffer_size = current_packet.packet->dataLength - 12; + *r_buffer = (const uint8_t *)(¤t_packet.packet->data[8]); + r_buffer_size = current_packet.packet->dataLength - 8; return OK; } @@ -543,11 +548,10 @@ Error NetworkedMultiplayerENet::put_packet(const uint8_t *p_buffer, int p_buffer } } - ENetPacket *packet = enet_packet_create(NULL, p_buffer_size + 12, packet_flags); + ENetPacket *packet = enet_packet_create(NULL, p_buffer_size + 8, packet_flags); encode_uint32(unique_id, &packet->data[0]); // Source ID encode_uint32(target_peer, &packet->data[4]); // Dest ID - encode_uint32(packet_flags, &packet->data[8]); // Dest ID - copymem(&packet->data[12], p_buffer, p_buffer_size); + copymem(&packet->data[8], p_buffer, p_buffer_size); if (server) { @@ -684,7 +688,9 @@ size_t NetworkedMultiplayerENet::enet_compress(void *context, const ENetBuffer * case COMPRESS_ZSTD: { mode = Compression::MODE_ZSTD; } break; - default: { ERR_FAIL_V(0); } + default: { + ERR_FAIL_V(0); + } } int req_size = Compression::get_max_compressed_buffer_size(ofs, mode); @@ -721,7 +727,8 @@ size_t NetworkedMultiplayerENet::enet_decompress(void *context, const enet_uint8 ret = Compression::decompress(outData, outLimit, inData, inLimit, Compression::MODE_ZSTD); } break; - default: {} + default: { + } } if (ret < 0) { return 0; |